<nav>
	<ul>
		<li>nav01</li>
		<li>nav02</li>
		<li>nav03</li>
		<li>nav04</li>
		<li>nav05</li>
	</ul>
</nav>

* {
	box-sizing: border-box;
}
body {
	min-height: 100vh;
	margin: 0;
	padding: 10px;
	display: flex;
	justify-content: center;
	align-items: center;
}
li:not(:last-of-type) {
	border-right: 1px solid #fff;
}

nav ul {
	display: table;
	table-layout: fixed;
}
nav ul li {
	display: table-cell;
	color: #fff;
	background: #ef88a7;
	padding: 10px 30px;
}